Safe control and signal for pump-operating mechanism



- 1,624,784 April 12 192?. J. J FRASER SAFE CONTROL AND SIGNAL FOR PUMP OPERATING MECHANISM Filed Dec 6, 19 Y gwumdoz Patented Apr. 12, 1927.

JoH v AMEs FRASER, on CAMDEN. ARKANSAS, ASSIGNOR or FORTY-FIVE PER T0 HENRY n. FARABEE, or CAMDEN, annensas. I

rear .or'FicE. I

SAFE CONTROL AND SIGNAL FOR PUMP-OPERATING MECEIANISll I.

application filed December 6, 1924. Serial No. 754,451.

-This invention relates to a highly novel 1116341181501 automatically stopping the engine which controls the operation of the.

pumping mechanism when a part of. the

mechanism. becomes inoperative.

A further object is to provide means to provide a device of the above mentioned:

character, which is simple in construction, inexpensive, strong and durable and furthermore adapted for the purposes for which it is designated. 7

Other. objects andadvantages of this invention will become apparent during the course of the following description.

In the accompanying drawing forming a 1 part of this specification and in which like upper portion of the pitman and the beam i is connectedto the means for cutting off the numerals designate like parts throughout the same: V

Figure 1 is a side elevation of the standard showing the weighted member supported thereon in its normal inoperative posit-ion and the engine control cable connected to the weighted member, and J Figure 2 is a fragmentary detail of the of a pumping ring showing the manner in which the cable which isattached to the weighted member supporting means is held in engagement with the pitman.

In the drawing. wherein for the purpose of illustration is shown the preferred embodiment of my invention, the numeral 1 designates a supporting standard which preferably placed in the engine room adjacent the engine throttle, motor switch or other apparatus used in cutting off the operation of the engine (not shown) and which provides a means for operating the pump rig. A shelf or the like shown at 2 is hingedly supported on the top of the.

standardl as at 3 and supports thereon the weight 4. The engine control cable which engineat one end has its opposite end conllQCtOtllQ the weight l and is indicated at team- An arnrG is universally hinged on the lower portion. of the standard '1' as illustrated at 7 and the upper endthereof is adapted'tc seat in a suitable notch or recess or the like shown at'8 which is formed in the bottom of the shelf 2 whereby'r'the shelf andfthe weighted member 4 carried thereby'willl be normally supported in an inoperative posi- U011 thereby rendering the engine control cable idle and permitting the operation of the engine during the pumping of the well.

Ihe pitinan and beam associated thereing rig and are illustrated at 15and 16 re' 'spectively in the drawing with reference more particularly to Figure 2. A'p'in 17 fis driven into the pitman15 'adjacent'tl e up per end thereof and a small portion thereof extends outwardly fromsthe side of the pitfor receiving the outwardly extending portion of the pm. A wire 20 is secured at one with are of any well known form of pumpend to the weight 18 as illustrated at 21 and the opposite end of the wire is fastened to the collar 14 whichis mounted on the shelf supporting arm 6. Normally when the pitman and beam of the pumping rig are op erating properly, the weight 18 will be supported against displacement from the outer" end of the pin 17.

Should the pumping rig in any way be come inoperative, so that the pit-man and the beam associated therewith cannot properly function, the weight 18 will become 'dis lodged from the pin 17 due to the jarring action imparted to the pitman. Such arring action may be. caused by reason of the pitman coming in contact with an obstruction :in the well. This willlcause a pull to be exerted on the wire 20, and as a result, the

shelf supporting arm 6 will be moved out of engagement with the shelf, and the weight 4 will thereby automatically swing downwardly exerting a pull on the engine control cable 5 and the latter in turnwill cut off the engine. a V a v Simultaneous with the cuttingoif of the operation of the'engine which operates the pumping rig, an audible signal will be operated, and" to this end I provide an electric bell 22 which is arranged in a suitable electric circuit 23, the stationary contact 24 being mounted on the standard 1 adjacent the upper end thereof, the shelf 2 carrying a contact 25 which is adapted for engagement With the contact 24 to close the circuit to the bell when the shelf supporting arm 6 is disengaged from the shelf and the weight lcauses the shelf to swing downwardly.

The operation of the audible signal will thereby indicate to the operator of the pump stood that various changes inthe size, shape and arrangement of parts may be resorted to without departing from the spirit of the invention and the scope of the appended claims. 7

Having thus described the invention, What I I claim is 1.. A device of the class described comprising-a supporting standard, a shelf hinged on the, upperv end of said standard, a weight carried by saidishelf, an engine eontrolea-ble the upper end of said arm from said shelf whereby the shelf is automatically swung downwardly by said weight and actuates the cable to-cut off the engine.

2. A device of the class described comprising; a supporting standard, a shelf hingedto the upper end of the standard: on; one side thereof, said shelf havingia notch; formed in the bottom of the outer: end portiontliereof, a weight carried by the shelf, anengine-conitrol cable associated with said; weight, an arm hingedly supported at its lower-end; on said standard, the upper. end-of said arm. en:- gaging in said notch fornormally holding the shelf in a raised position, whereby the engine, control cable is idle, and a pull-cable: connected to said arm for disengaging the upper 611d! thereof from the detentv in; the shelf, whereby the shelf is automatically swung; downwardly by said: weight, and

simultaneously actuatesthex'fi-rstz mentioned cable to cut offthe engine; 7

In testimony whereof I; aflix my signature;

I JOHN JAMES ItRASElt.v 

